Economies of Scope
Description
"An economy of scope exists between the production of two goods when two goods which share a CommonCost are produced together such that the CommonCost is reduced.
The affect of an economy of scope is to increase the efficiency of production as a result of increasing the number of different but related products offered.
This may happen when the same knowledge and information is required both to produce something and to consume that product within subsequent productions. Also, this may happen when similar information is required both to produce something and to produce a different product." (http://appropriatesoftware.net/wiki?EconomyOfScope)